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Exterior Wall

Outsulation contributes to high-performance building design as it assists with three critical elements: excellent insulation, airtightness and reduced thermal bridging.

By wrapping the structure, continuous external insulation helps to lower the risk of water entry or interstitial condensation, both contributors to mould growth.

Outsulation is simple. Comfortably fitting in the build process with only minimal changes to detailing and cladding attachments needed. The air control layer is located outside the structure, where the wall underlay is traditionally installed, so wall-to-floor junctions are easily accomodated.


Get the Designer's Guide

For a deeper dive into the technical aspects of Continuous Insulation for walls, download our comprehensive design guide - Outsulation for High-Performance Walls. 

Wall Insulation Options

Render 2

ROCKWOOL Thermalrock S offers a specific range of solutions for exterior walls with good thermal performance, excellent acoustic performance and non-combustible characteristics in its construction. A wide range of densities is available to suit the fixing details of the cladding involved. 


  • Improve comfort with good thermal insulation.

  • Allows vapour to pass through

  • ROCKWOOL does not slump. Fire & thermal performance lasts the lifetime of the building.

  • Due to the strand structure and its natural water repellency, Rockwool does not absorb water

  • Noise and vibration from external sources dampened significantly

IKO Enertherm PIR is a high-performing solution for the insulation of exterior walls. The continuous layer of insulation can minimize airflow and eliminate insulation gaps and reduce thermal bridging.


  • Various cladding finishes are possible: timber, zinc, tiles etc.

  • Nearly 40 % thinner than XPS or EPS with the same R-value.

  • Wind and moisture-proof insulation shield.

  • High Compressive strength yet can be cut and installed quickly and easily.

  • Does not absorb moisture

brick wall.

A question...

In a BRANZ study of traditional New Zealand walls, based on modelling, how many buildups exhibit mould accumulation?

The answer is...

Every wall buildup analyzed...

"current typical New Zealand walls are at a high risk of damage due to mould growth" pg50

BRANZ research_edited

Cladding Options

Contact us to discuss any of these cladding options.

Need CAD Details & Specs?

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